From the back cover:
Hamlet of Horror!
Arkham is a small town along the Massachusetts coast - the setting favored by author Howard Phillips Lovecraft in his tales of monstrous horror.
All in all a quiet place, Arkham is best-known as the home of Miskatonic University, an excellent school becoming known for the collection of esoteric and disturbing volumes residing in its library's restricted collection. These tomes form the foundation of all current efforts to thwart the dire desires of the Mythos legion.
Arkham Unveiled contains extensive background information about this New England town - written to be used by serious investigators as a base from which to further explore the mysteries of the Cthulhu Mythos. Pertinent buildings, useful people, and important locations are described in depth. A 17" × 22" Players Map of Arkham is bound into the back, and four new, thrilling adventures complete the package. These sinister tales make full use of the background materials and provide the utmost challenge to the players' roleplaying and investigatory skills.
A background supplement for 1920s Call of Cthulhu, detailing the New England town of Arkham. Four scenarios are included:
- A Little Knowledge
- The Hills Rise Wild
- The Condemned
- Dead of Night